First Book
General Provisions
Section One
Preliminary Provisions
CHAPTER TWO
Applicability of the Law
Part Two
Applicaticn of the Law from the Point of View of Time
Article 21 :
(1) A person committing a crime is punished in accordance with a law that is in force at the time of commitment of the act, except when before pronouncement of the final verdict a new law which is in favour of the accused comes into force.
EDIT.